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Mesoscale Discussion 697
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   Mesoscale Discussion 0697
   NWS Storm Prediction Center Norman OK
   0242 PM CDT Sun Jun 10 2018

   Areas affected...East-Central IL...West-Central IN

   Concerning...Severe Thunderstorm Watch 168...

   Valid 101942Z - 102115Z

   The severe weather threat for Severe Thunderstorm Watch 168
   continues.

   SUMMARY...Threat for damaging wind gusts and perhaps a tornado or
   two continues across east-central IL. Downstream threat across
   west-central IN will likely merit the issuance of another watch
   soon.

   DISCUSSION...MCS moving across central IL has recently exhibited an
   increase in forward motion, likely as a result of increased forward
   propagation into the warm, moist, and inhibition-free airmass
   downstream. New storm development as also occurred ahead of the
   line, increasing the probability for continued forward propagation.
   Current storm motion is estimated as 310 degrees at 35 kt. Northern
   portion of the line appears to be moving a little faster (i.e.
   closer to 40 kt). This southeastward progression will likely take
   the northern portion of the line to the edge of Severe Thunderstorm
   Watch 168 by 20Z. Downstream airmass across west-central/southern IN
   remains favorable for continued MCS progression and downstream watch
   will likely be needed soon.

   One other item of note is the increased southeasterly winds in place
   immediately along the warm front draped from near CMI southward into
   far southwest IN. Resulting localized enhancement of the low-level
   shear may contribute to brief tornado potential.

   ..Mosier/Grams.. 06/10/2018

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...IND...LOT...ILX...LSX...

   LAT...LON   40108999 40648848 40668734 40258643 39168623 38728650
               38608719 38628771 38758858 39118956 40108999 

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Page last modified: June 10, 2018
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